I've been alternating between these two editors for the past number of months. Atom's plugin architecture is the big selling point, it's pretty straightforward

I've been alternating between these two editors for the past number of months. Atom's plugin architecture is the big selling point, it's pretty straightforward to create a plugin and leverage the huge number of libs on NPM. Using APM and stars, I can also keep my Atom plugins in sync across different computers on different platforms (mac/ubuntu) running Atom. There are still a number of annoyances though. Something that immediately comes to mind: I'm using Polymer.js at the moment and I have a lot of inline CSS/JS in my HTML Components, when I comment out some CSS/JS (using cmd + /) it always uses a <!-- HTML comment -->. I've now learned this behaviour but it's still a pain in the ass. Lots of little issues like this. Performance of Atom is decent enough on my new MBP and it hasn't been a big issue for me. I'm not working with large documents though.